/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:44:37,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:44:37,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:44:37,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:44:37,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:44:37,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:44:37,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:44:37,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:44:37,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:44:37,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:44:37,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:44:37,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:44:37,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:44:37,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:44:37,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:44:37,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:44:37,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:44:37,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:44:37,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:44:37,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:44:37,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:44:37,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:44:37,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:44:37,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:44:37,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:44:37,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:44:37,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:44:37,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:44:37,464 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:44:37,465 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 16:44:37,470 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:44:37,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:44:37,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:44:37,472 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 16:44:37,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:44:37,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:44:37,499 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:44:37,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:44:37,500 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:44:37,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:44:37,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:44:37,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:44:37,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:44:37,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:44:37,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:44:37,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:44:37,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:44:37,503 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:44:37,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:44:37,503 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:44:37,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:44:37,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:44:37,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:44:37,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:44:37,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:44:37,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:37,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:44:37,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:44:37,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:44:37,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:44:37,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:37,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:44:37,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:44:37,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:44:37,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:44:37,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:44:37,792 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:44:37,794 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:44:37,794 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:44:37,795 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 16:44:37,853 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0a73207/a28db7609a984009a9f64000ee584edd/FLAG6049bc563 [2020-07-21 16:44:38,280 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:44:38,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 16:44:38,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0a73207/a28db7609a984009a9f64000ee584edd/FLAG6049bc563 [2020-07-21 16:44:38,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c0a73207/a28db7609a984009a9f64000ee584edd [2020-07-21 16:44:38,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:44:38,689 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:44:38,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:38,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:44:38,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:44:38,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:38" (1/1) ... [2020-07-21 16:44:38,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3329991b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:38, skipping insertion in model container [2020-07-21 16:44:38,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:44:38" (1/1) ... [2020-07-21 16:44:38,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:44:38,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:44:38,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:38,952 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:44:39,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:44:39,078 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:44:39,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39 WrapperNode [2020-07-21 16:44:39,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:44:39,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:44:39,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:44:39,080 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:44:39,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... [2020-07-21 16:44:39,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... [2020-07-21 16:44:39,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... [2020-07-21 16:44:39,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... [2020-07-21 16:44:39,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... [2020-07-21 16:44:39,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... [2020-07-21 16:44:39,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... [2020-07-21 16:44:39,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:44:39,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:44:39,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:44:39,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:44:39,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:44:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:44:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:44:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:44:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure r_strncpy [2020-07-21 16:44:39,195 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_expression_list [2020-07-21 16:44:39,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:44:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:44:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:44:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2020-07-21 16:44:39,196 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2020-07-21 16:44:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2020-07-21 16:44:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-07-21 16:44:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy_ptr [2020-07-21 16:44:39,197 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2020-07-21 16:44:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2020-07-21 16:44:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2020-07-21 16:44:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-21 16:44:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2020-07-21 16:44:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2020-07-21 16:44:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure isascii [2020-07-21 16:44:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure isspace [2020-07-21 16:44:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure getc [2020-07-21 16:44:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure strrand [2020-07-21 16:44:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure istrrand [2020-07-21 16:44:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure istrchr [2020-07-21 16:44:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure istrrchr [2020-07-21 16:44:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure istrncmp [2020-07-21 16:44:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure istrstr [2020-07-21 16:44:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncpy [2020-07-21 16:44:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcpy [2020-07-21 16:44:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure r_strcat [2020-07-21 16:44:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure r_strncat [2020-07-21 16:44:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure r_memcpy [2020-07-21 16:44:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure parse_expression_list [2020-07-21 16:44:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 16:44:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:44:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:44:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:44:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:44:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:44:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:44:39,582 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:44:39,583 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 16:44:39,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:39 BoogieIcfgContainer [2020-07-21 16:44:39,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:44:39,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:44:39,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:44:39,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:44:39,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:44:38" (1/3) ... [2020-07-21 16:44:39,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eba5079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:39, skipping insertion in model container [2020-07-21 16:44:39,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:44:39" (2/3) ... [2020-07-21 16:44:39,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eba5079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:44:39, skipping insertion in model container [2020-07-21 16:44:39,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:44:39" (3/3) ... [2020-07-21 16:44:39,595 INFO L109 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-07-21 16:44:39,603 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:44:39,610 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:44:39,621 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:44:39,640 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:44:39,641 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:44:39,641 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:44:39,641 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:44:39,641 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:44:39,641 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:44:39,642 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:44:39,642 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:44:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-07-21 16:44:39,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 16:44:39,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:39,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:39,669 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2018987797, now seen corresponding path program 1 times [2020-07-21 16:44:39,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:39,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363612813] [2020-07-21 16:44:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:39,920 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:39,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:44:39,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:39,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:39,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363612813] [2020-07-21 16:44:39,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:39,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:44:39,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017747997] [2020-07-21 16:44:39,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:44:39,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:44:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:44:39,981 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 2 states. [2020-07-21 16:44:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:40,010 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2020-07-21 16:44:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:44:40,011 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-07-21 16:44:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:40,018 INFO L225 Difference]: With dead ends: 93 [2020-07-21 16:44:40,018 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 16:44:40,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:44:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 16:44:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-21 16:44:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 16:44:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-07-21 16:44:40,062 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-07-21 16:44:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:40,062 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-07-21 16:44:40,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:44:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-07-21 16:44:40,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:44:40,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:40,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:40,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,278 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash -171780126, now seen corresponding path program 1 times [2020-07-21 16:44:40,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:40,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895250805] [2020-07-21 16:44:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:40,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:40,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 16:44:40,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:40,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:40,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:40,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895250805] [2020-07-21 16:44:40,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:40,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 16:44:40,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125745540] [2020-07-21 16:44:40,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 16:44:40,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:40,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 16:44:40,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:40,406 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2020-07-21 16:44:40,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:40,428 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2020-07-21 16:44:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 16:44:40,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-07-21 16:44:40,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:40,430 INFO L225 Difference]: With dead ends: 78 [2020-07-21 16:44:40,430 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 16:44:40,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 16:44:40,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 16:44:40,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 16:44:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 16:44:40,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-07-21 16:44:40,440 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 33 [2020-07-21 16:44:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:40,440 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-07-21 16:44:40,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 16:44:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-07-21 16:44:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:44:40,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:40,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:40,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,656 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash 250921700, now seen corresponding path program 1 times [2020-07-21 16:44:40,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:40,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132555567] [2020-07-21 16:44:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:40,773 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:40,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 16:44:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:40,822 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:40,845 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:40,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:40,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132555567] [2020-07-21 16:44:40,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:40,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:44:40,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749971322] [2020-07-21 16:44:40,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:44:40,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:44:40,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:44:40,860 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2020-07-21 16:44:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:40,967 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2020-07-21 16:44:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:44:40,967 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-21 16:44:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:40,971 INFO L225 Difference]: With dead ends: 102 [2020-07-21 16:44:40,971 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 16:44:40,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:44:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 16:44:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2020-07-21 16:44:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-21 16:44:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-07-21 16:44:40,984 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 33 [2020-07-21 16:44:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:40,984 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-07-21 16:44:40,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:44:40,985 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-07-21 16:44:40,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:44:40,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:40,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:41,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:41,201 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:41,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1210151716, now seen corresponding path program 1 times [2020-07-21 16:44:41,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:41,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964805174] [2020-07-21 16:44:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:41,268 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:41,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:41,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 16:44:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:41,302 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:41,329 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:41,379 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 16:44:41,381 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 16:44:41,385 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 16:44:41,385 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 16:44:41,385 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-07-21 16:44:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:41,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:41,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964805174] [2020-07-21 16:44:41,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:41,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 16:44:41,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517679954] [2020-07-21 16:44:41,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:44:41,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:41,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:44:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:44:41,404 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 8 states. [2020-07-21 16:44:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:41,563 INFO L93 Difference]: Finished difference Result 115 states and 144 transitions. [2020-07-21 16:44:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 16:44:41,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-07-21 16:44:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:41,566 INFO L225 Difference]: With dead ends: 115 [2020-07-21 16:44:41,566 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 16:44:41,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:44:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 16:44:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2020-07-21 16:44:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 16:44:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-07-21 16:44:41,577 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 33 [2020-07-21 16:44:41,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:41,577 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-07-21 16:44:41,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:44:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-07-21 16:44:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 16:44:41,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:41,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:41,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:41,794 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:41,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:41,794 INFO L82 PathProgramCache]: Analyzing trace with hash -783992990, now seen corresponding path program 1 times [2020-07-21 16:44:41,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:41,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068902037] [2020-07-21 16:44:41,795 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:41,852 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 16:44:41,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:41,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:44:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:41,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:41,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068902037] [2020-07-21 16:44:41,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:41,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 16:44:41,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109301232] [2020-07-21 16:44:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 16:44:41,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 16:44:41,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:44:41,895 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 5 states. [2020-07-21 16:44:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:42,032 INFO L93 Difference]: Finished difference Result 130 states and 163 transitions. [2020-07-21 16:44:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 16:44:42,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-07-21 16:44:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:42,033 INFO L225 Difference]: With dead ends: 130 [2020-07-21 16:44:42,033 INFO L226 Difference]: Without dead ends: 66 [2020-07-21 16:44:42,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:44:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-21 16:44:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 50. [2020-07-21 16:44:42,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 16:44:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-07-21 16:44:42,042 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 33 [2020-07-21 16:44:42,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:42,042 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-07-21 16:44:42,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 16:44:42,042 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-07-21 16:44:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 16:44:42,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:42,043 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:42,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:42,258 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:42,258 INFO L82 PathProgramCache]: Analyzing trace with hash -731835505, now seen corresponding path program 1 times [2020-07-21 16:44:42,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:42,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854968230] [2020-07-21 16:44:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:42,327 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:42,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:44:42,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:42,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:42,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:42,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854968230] [2020-07-21 16:44:42,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:42,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-07-21 16:44:42,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745692824] [2020-07-21 16:44:42,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 16:44:42,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:42,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 16:44:42,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:44:42,450 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 11 states. [2020-07-21 16:44:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:42,821 INFO L93 Difference]: Finished difference Result 254 states and 331 transitions. [2020-07-21 16:44:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 16:44:42,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-07-21 16:44:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:42,825 INFO L225 Difference]: With dead ends: 254 [2020-07-21 16:44:42,825 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 16:44:42,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-07-21 16:44:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 16:44:42,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 63. [2020-07-21 16:44:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 16:44:42,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-07-21 16:44:42,837 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 38 [2020-07-21 16:44:42,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:42,838 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-07-21 16:44:42,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 16:44:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-07-21 16:44:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-21 16:44:42,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:42,839 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:43,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:43,048 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1568987085, now seen corresponding path program 1 times [2020-07-21 16:44:43,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:43,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572445963] [2020-07-21 16:44:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:43,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:43,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 16:44:43,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:43,157 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:43,158 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:43,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:43,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:43,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572445963] [2020-07-21 16:44:43,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:43,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-07-21 16:44:43,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952695306] [2020-07-21 16:44:43,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 16:44:43,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:43,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 16:44:43,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:44:43,261 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 12 states. [2020-07-21 16:44:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:43,525 INFO L93 Difference]: Finished difference Result 139 states and 167 transitions. [2020-07-21 16:44:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 16:44:43,525 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-07-21 16:44:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:43,527 INFO L225 Difference]: With dead ends: 139 [2020-07-21 16:44:43,527 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 16:44:43,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:44:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 16:44:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 84. [2020-07-21 16:44:43,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-21 16:44:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-07-21 16:44:43,539 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 38 [2020-07-21 16:44:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:43,540 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-07-21 16:44:43,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 16:44:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-07-21 16:44:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 16:44:43,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:43,542 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:43,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:43,756 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash -713294332, now seen corresponding path program 2 times [2020-07-21 16:44:43,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:43,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461572671] [2020-07-21 16:44:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:43,825 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:43,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 16:44:43,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:43,858 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 16:44:43,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:43,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461572671] [2020-07-21 16:44:43,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:43,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 16:44:43,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753068832] [2020-07-21 16:44:43,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 16:44:43,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 16:44:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 16:44:43,876 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 6 states. [2020-07-21 16:44:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:44,051 INFO L93 Difference]: Finished difference Result 245 states and 306 transitions. [2020-07-21 16:44:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:44:44,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-07-21 16:44:44,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:44,055 INFO L225 Difference]: With dead ends: 245 [2020-07-21 16:44:44,055 INFO L226 Difference]: Without dead ends: 165 [2020-07-21 16:44:44,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:44:44,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-21 16:44:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 113. [2020-07-21 16:44:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-21 16:44:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2020-07-21 16:44:44,070 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 43 [2020-07-21 16:44:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:44,070 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2020-07-21 16:44:44,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 16:44:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2020-07-21 16:44:44,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 16:44:44,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:44,072 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:44,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:44,283 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1587528258, now seen corresponding path program 2 times [2020-07-21 16:44:44,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:44,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916969392] [2020-07-21 16:44:44,286 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:44,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:44,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 16:44:44,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:44,386 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:44,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:44,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916969392] [2020-07-21 16:44:44,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:44,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 16:44:44,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852222846] [2020-07-21 16:44:44,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 16:44:44,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 16:44:44,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 16:44:44,424 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand 8 states. [2020-07-21 16:44:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:44,577 INFO L93 Difference]: Finished difference Result 281 states and 351 transitions. [2020-07-21 16:44:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 16:44:44,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-07-21 16:44:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:44,579 INFO L225 Difference]: With dead ends: 281 [2020-07-21 16:44:44,579 INFO L226 Difference]: Without dead ends: 206 [2020-07-21 16:44:44,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-07-21 16:44:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-07-21 16:44:44,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 123. [2020-07-21 16:44:44,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-21 16:44:44,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 149 transitions. [2020-07-21 16:44:44,604 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 149 transitions. Word has length 43 [2020-07-21 16:44:44,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:44,605 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 149 transitions. [2020-07-21 16:44:44,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 16:44:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 149 transitions. [2020-07-21 16:44:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 16:44:44,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:44,607 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:44,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:44,822 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:44,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1746971937, now seen corresponding path program 1 times [2020-07-21 16:44:44,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:44,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449797398] [2020-07-21 16:44:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:44,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:44,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:44,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:44:44,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:44,899 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-07-21 16:44:44,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:44:44,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449797398] [2020-07-21 16:44:44,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:44:44,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:44:44,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770970623] [2020-07-21 16:44:44,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:44:44,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:44,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:44:44,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:44:44,908 INFO L87 Difference]: Start difference. First operand 123 states and 149 transitions. Second operand 4 states. [2020-07-21 16:44:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:44,932 INFO L93 Difference]: Finished difference Result 208 states and 253 transitions. [2020-07-21 16:44:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:44:44,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-07-21 16:44:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:44,935 INFO L225 Difference]: With dead ends: 208 [2020-07-21 16:44:44,935 INFO L226 Difference]: Without dead ends: 129 [2020-07-21 16:44:44,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 16:44:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-21 16:44:44,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-07-21 16:44:44,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 16:44:44,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2020-07-21 16:44:44,954 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 45 [2020-07-21 16:44:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:44,954 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2020-07-21 16:44:44,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:44:44,954 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2020-07-21 16:44:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 16:44:44,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:44,959 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:45,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:45,174 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:45,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:45,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1526927005, now seen corresponding path program 1 times [2020-07-21 16:44:45,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:45,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797996570] [2020-07-21 16:44:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:45,238 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:45,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:45,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:44:45,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:45,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:45,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797996570] [2020-07-21 16:44:45,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:45,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-07-21 16:44:45,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683388332] [2020-07-21 16:44:45,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 16:44:45,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 16:44:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-07-21 16:44:45,411 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand 15 states. [2020-07-21 16:44:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:46,208 INFO L93 Difference]: Finished difference Result 519 states and 664 transitions. [2020-07-21 16:44:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 16:44:46,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-07-21 16:44:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:46,211 INFO L225 Difference]: With dead ends: 519 [2020-07-21 16:44:46,211 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 16:44:46,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 16:44:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 16:44:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 155. [2020-07-21 16:44:46,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-21 16:44:46,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-07-21 16:44:46,234 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 45 [2020-07-21 16:44:46,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:46,235 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-07-21 16:44:46,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 16:44:46,235 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-07-21 16:44:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 16:44:46,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:46,238 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:46,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:46,440 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash -2066975713, now seen corresponding path program 1 times [2020-07-21 16:44:46,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:46,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702240396] [2020-07-21 16:44:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:46,510 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:46,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 16:44:46,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:46,610 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:46,627 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:46,628 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:44:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:46,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:46,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:46,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:46,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702240396] [2020-07-21 16:44:46,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:46,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2020-07-21 16:44:46,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219759518] [2020-07-21 16:44:46,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 16:44:46,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:46,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 16:44:46,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-07-21 16:44:46,863 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 22 states. [2020-07-21 16:44:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:47,886 INFO L93 Difference]: Finished difference Result 263 states and 316 transitions. [2020-07-21 16:44:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 16:44:47,886 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2020-07-21 16:44:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:47,889 INFO L225 Difference]: With dead ends: 263 [2020-07-21 16:44:47,889 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 16:44:47,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 16:44:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 16:44:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 142. [2020-07-21 16:44:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 16:44:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2020-07-21 16:44:47,907 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 45 [2020-07-21 16:44:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:47,907 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2020-07-21 16:44:47,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 16:44:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2020-07-21 16:44:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 16:44:47,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:47,909 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:48,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:48,124 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:48,125 INFO L82 PathProgramCache]: Analyzing trace with hash 709278555, now seen corresponding path program 1 times [2020-07-21 16:44:48,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:48,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050023669] [2020-07-21 16:44:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:48,198 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:48,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:44:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 16:44:48,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:44:48,298 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:48,301 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 16:44:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:48,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:44:48,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:44:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:44:48,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050023669] [2020-07-21 16:44:48,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:44:48,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2020-07-21 16:44:48,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56985668] [2020-07-21 16:44:48,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 16:44:48,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:44:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 16:44:48,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-07-21 16:44:48,459 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand 18 states. [2020-07-21 16:44:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:44:49,238 INFO L93 Difference]: Finished difference Result 316 states and 387 transitions. [2020-07-21 16:44:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-21 16:44:49,239 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-07-21 16:44:49,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:44:49,243 INFO L225 Difference]: With dead ends: 316 [2020-07-21 16:44:49,243 INFO L226 Difference]: Without dead ends: 314 [2020-07-21 16:44:49,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 16:44:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-21 16:44:49,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 161. [2020-07-21 16:44:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 16:44:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 198 transitions. [2020-07-21 16:44:49,268 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 198 transitions. Word has length 45 [2020-07-21 16:44:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:44:49,270 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 198 transitions. [2020-07-21 16:44:49,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 16:44:49,271 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 198 transitions. [2020-07-21 16:44:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-21 16:44:49,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:44:49,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:44:49,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:49,485 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:44:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:44:49,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1410343133, now seen corresponding path program 1 times [2020-07-21 16:44:49,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:44:49,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520881644] [2020-07-21 16:44:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:49,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:44:49,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:44:49,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:44:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:44:49,571 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:44:49,645 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:44:49,645 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:44:49,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:44:49,875 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,877 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,878 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,878 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,879 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,880 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,880 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,881 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,882 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,882 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,883 WARN L1295 BoogieBacktranslator]: Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement [2020-07-21 16:44:49,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:44:49 BoogieIcfgContainer [2020-07-21 16:44:49,895 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:44:49,897 INFO L168 Benchmark]: Toolchain (without parser) took 11209.19 ms. Allocated memory was 138.4 MB in the beginning and 323.5 MB in the end (delta: 185.1 MB). Free memory was 102.9 MB in the beginning and 291.4 MB in the end (delta: -188.5 MB). Peak memory consumption was 176.1 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:49,898 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 16:44:49,898 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.55 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 102.5 MB in the beginning and 179.0 MB in the end (delta: -76.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:49,899 INFO L168 Benchmark]: Boogie Preprocessor took 46.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 176.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:49,900 INFO L168 Benchmark]: RCFGBuilder took 460.81 ms. Allocated memory is still 201.9 MB. Free memory was 176.0 MB in the beginning and 148.7 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:49,900 INFO L168 Benchmark]: TraceAbstraction took 10307.07 ms. Allocated memory was 201.9 MB in the beginning and 323.5 MB in the end (delta: 121.6 MB). Free memory was 148.7 MB in the beginning and 291.4 MB in the end (delta: -142.7 MB). Peak memory consumption was 158.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:44:49,903 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 389.55 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 102.5 MB in the beginning and 179.0 MB in the end (delta: -76.6 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 176.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 460.81 ms. Allocated memory is still 201.9 MB. Free memory was 176.0 MB in the beginning and 148.7 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10307.07 ms. Allocated memory was 201.9 MB in the beginning and 323.5 MB in the end (delta: 121.6 MB). Free memory was 148.7 MB in the beginning and 291.4 MB in the end (delta: -142.7 MB). Peak memory consumption was 158.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression #t~switch4 has a C AST node but it is no IASTExpression: class org.eclipse.cdt.internal.core.dom.parser.c.CASTSwitchStatement * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L74] char A [2 + 2 + 4 +1]; [L75] A[2 + 2 + 4] = 0 VAL [A={2:0}] [L76] CALL parse_expression_list (A) VAL [str={2:0}] [L48] int start=0, i=-1, j=-1; [L49] char str2[2]; VAL [i=-1, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}] [L50] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}] [L52] i++ [L53] str[i] [L54] case 0: VAL [i=0, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=13] [L69] EXPR str[i] VAL [i=0, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=13] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=1, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=14] [L69] EXPR str[i] VAL [i=1, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=14] [L69] COND TRUE str[i] != 0 [L52] i++ [L53] str[i] [L54] case 0: VAL [i=2, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0] [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') [L55] EXPR str[start] [L55] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0, str[start]=13, str[start]=13] [L55] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L56] EXPR str[start] VAL [i=2, j=-1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0, str[start]=13] [L56] COND FALSE !(str[start] == '"') [L57] j = i-1 VAL [i=2, j=1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') [L58] EXPR str[j] [L58] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0, str[j]=14, str[j]=14] [L58] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0, str[j]=14, str[j]=14] [L58] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L59] (0 < j) && (str[j] == '"') [L59] EXPR str[j] [L59] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0, str[j]=14] [L59] COND FALSE !((0 < j) && (str[j] == '"')) [L60] COND TRUE start<=j VAL [i=2, j=1, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0] [L61] CALL r_strncpy(str2, str+start, j-start+1) VAL [\old(n)=2, dest={3:0}, src={2:0}] [L30] return strncpy(dest,src,n); [L61] RET r_strncpy(str2, str+start, j-start+1) VAL [i=2, j=1, r_strncpy(str2, str+start, j-start+1)={17:18}, start=0, str={2:0}, str={2:0}, str2={3:0}, str[i]=0] [L62] CALL __VERIFIER_assert(j - start + 1 < 2) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.2s, OverallIterations: 14, TraceHistogramMax: 3, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 720 SDtfs, 2024 SDslu, 3047 SDs, 0 SdLazy, 2502 SolverSat, 470 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 793 GetRequests, 602 SyntacticMatches, 6 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 690 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 548 NumberOfCodeBlocks, 532 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 696 ConstructedInterpolants, 0 QuantifiedInterpolants, 103198 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1860 ConjunctsInSsa, 108 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 27/89 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...